Abstract
The Sr3B2O6:Eu2+ yellow phosphors were synthesized by high-temperature solid state reaction method. The crystal structure and optical properties of the Sr3B2O6:Eu2+ phosphor was studied. Results indicate that Sr3B2O6:Eu2+ has a hexagonal crystal structure. The excitation spectrum indicates that this phosphor can be effectively excited by ultraviolet light of near 390nm and blue light of 460nm. The emission spectrum shows a intense broad band spectrum peaking at 566nm, which corresponds to the 4f6(7F)5d (2eg)→8S7/2 (4f7)transition of Eu2+ ion. The excitation spectrum is a broad asymmetric excitation band extending from 300nm to 500nm and the main excitation peak is at 468nm. The average electronegativity of O2− ions located around Eu2+ ion is 1.9991eV. The optimum concentration of Eu2+ is 7mol%. The concentration quenching mechanism can be interpreted by the dipole–dipole (d–d) interaction of Eu2+ ions.
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